Adjustable cutting torch holder



Jan. 17, 1950 D. 1.. FORREST 2 494[,698

ADJUSTABLE CUTTING TORCH HOLDER Filed Sept. 24,1945 5 Shefs-Sheet 1 DONALD L. F ORRE'JS 7 IN V EN TOR.

A TTORNEV Jan, 17, 1950 FORREST 2,494,698

ADJUSTABLE CUTTING TORCH HOLDER Filed Sep'h. 24, 1945 5 Sheets-Sheet 2 DONALD LFORREST g INVENTOR.

- BYCLQLZZYQ ATTORNEY Jan 17,, 195% D. L. FORREST 2 ,494,698

ADJUSTABLE CUTTING TORCH HOLDER Filed Sept. 24, 1945 V 3 Sheets-Sheet 3 DONALD L.FORRE$ T INVENTOR.

A T701? NEY Patented Jan. 17, 1950 ADJUSTABLE CUTTING TORCH-IHOLDERW Donald L. ForresdLFort Worth; Tex., assignor'of five per cent to Fort Worth Structural Steel Company, FortiWorth, Tex., a corporation of Texas Application September 24, 1945, SeriaLNo. 618,299

Claims.

This invention relates to adjustable holding apparatus for acetylene cutting torches and it.

has particular reference to holding devices for torches used in cutting various angles on pipe and tubing, or the like uandjits principalobject resides in the provision of apparatuslwhereby pipe or tubing maybe cut on any desired angle for. joining, asintruss-work, and wherein pipe or tubing of difierent diameters can. be perfectly.

joined at varying angleswithout the use of patterns, templates, jorthejlike.

Another object of the invention resides in .the provision of a cutting torch holder whereby steel plate, as well'as pipe ortubing, can be cut onlanyv desired angle .or. bevel,l including arcs, without the: use of patterns or templates thus enabling any an instrument for adjustably holding a cutting" torch in the proper angular relation to the workl to which it is applied by simply-adjusting the device in advance in accordance with the predetermined angle to be cutand which may be'indicated on a blue print or drawing before the operator.

Broadly, the invention seeks to comprehend the provision of a cutting torch holder whichis' capable of saving considerable time and expense in laying out and cutting angles; particularly on" pipe andtubing of various diameters, and which is simple in design andconstruction and possesses great flexibility in operation.

While the foregoing objects are paramount,

other and'lesser objects will become'manifestasthe description proceeds, taken in connection with the appended drawings wherein:

Figure 1 shows the inventionin 'perspective and illustrates the torch adjusted to a IJOSltiOnfOI' a 45 degreecut.

FigureZ is another perspective view of the in-- vention arranged upon awork table and illus trates the torch applied'tothe work"at 45 de-- grees and illustrating the protractor and indicator.

Figure 3 r is a perspective illustration of themventionshowingthe torch applied to the workzatan angle and showing; in dotted lines, the vary-- ing positions of the torch: inuexecutingl an arcuate cut as illustratedin Figures 2 ands.

Figureeiis a plan view of; the invention show-- ing; i the torch applied to. the; work it at: approxlemately degrees and illustrating the-graduated protractor and indicator and showing in dotted? lines-the=varying positions ofthe torch' in operation.

Figure 5 is a fragmentary cross-sectional illuse tration of the protractorandi indicator assembly taken on lines 5-5 of Figure 4.;

Figure 6 is aperspectiveillustratiomof thetorchl holder.

Figure 7 fragmentarilyillustrates anexample: of angularly arrangedstruts in a truss structure: in which the various angleswofpipe ends and framing; cuts are performed: by the use of the invention.

Figure; 8; illustrates another example of augus lar joints capable ofexecution by the use of the invention.

Figure 9 fragmentarily shows straight angular cuts joinedratiapproximately 45 degrees, and

Figures. 10-andllrillustrateangular; on bevel cuts from steel plate for bases or'caps for angular out pipe ortubing,

It is commonpractice toprovide-patterns or. templates for cutting pipe or tubing at the proper angles and contours toreffiect the proper joining at various angleslof pipe and tubing of the same or different diameters. It has also been necessary! to plot the proper angles and bevels for framing cuts into which lateral connections are made, The preparation of suchpatterns. or templates generally involves much expert mathematical calculation and the consumption of much valuable time whichis avoided by theme of the invention.

Accordingly, therefore, the invention comprises, primarily, a base plate I of suitable length to afford a properadjustment ofthe assembly to the work. Slots 2 areprovided'longitudinally of the plate I whereby thesamecan be adjustably securedto a table 3, or the like, by suchmeans as bolts 4, in a manner'illustrated in Figures 3 and 4.

Substantially intermediate the ends'of the base platel is secured thereto, as by welding, a protractor disk iwhich has graduations 6 arranged about its upper perimeter representing degrees, the entire circular arrangement of graduations being 360 degrees. A circular groove 1 is formed in theupperface of the protractor disk 5 which is inverted T-shaped in: section, as shown in Figure 5, to accommodate the -heads 8 of bolts 9 which serve to adjustably and rotatably secure an indicator plate lfltothe protractor disk 5 The indicator plate r i II, which is substantially ci1- cular. inform and is preferably thesame in diameter as theprotractor'disk:5,;is straight along one side a andhas; a: pointer: H lintegral withthis portion which is directed toward the graduations 6.

An integral boss I2 is centrally arranged upon the indicator plate I and a substantially inverted U-shaped bracket I3 is integrall supported upon the boss I2, as shown in Figures 1, 2 and 3. The bracket I3 is arranged so that its legs are in alignment with the pointer I I and thus provide for the pivotal attachment of supporting arms I4 and I5 to the bracket I3 so that longitudinally the arms I4 and I5 extend in the same plane with the pointer II but in an opposite direction.

The arm I4 is pivotally secured to the bracket I3 by a bolt It, or the like, and the arm I5 is similarly secured to the outer end of the arm I4 by a bolt ll. These arms I4 and I5 are adjustable but are normally rigid, as will become manifest presently. At the outer end of the arm I5 is pivotally attached a bar I8 which is preferably provided with graduations is along one of its sides, the function of which will be presently described.

A conventional acetylene cutting torch 29 is employed with the invention by fitting the mounting pin thereof (not shown) into the split collar 2! integral with a square sleeve 22, shown in detail in Figure 6, which is slidably arranged upon the bar l8, in the manner shown in Figures 1, 2 and 3, and which may be fixed at any desired point along the length of the bar I8 and the graduations I9 thereon by a set screw 23.

In performing angular cuts, such as those illustrated in Figures 2 and 4, as well as those shown in Figures 1 to 11, inclusive, it is impor tant that the torch 26 be arranged at right angles, or transversely to, the bar I8 and the arms l4 and I5, as in Figures 2, 3 and 4. Thus, when the indicator II is properly positioned and the plate Ill made secure, the torch 20 is arranged at the proper angle for the cut. The arms I4 and I5, being in alignment with the pointer II, will be extended at the degree of angulation indicated by the pointer II on the protractor 5.

This arrangement is illustrated particularly in Figure 4 in which the pointer II is shown to be pointing to 45 degrees. It will be noted that the torch 20 is applied to the Work 24 at an angle of 45 degrees. The torch is caused to move in an arcuate path 25, indicated in Figures 2 and 4, by moving the bar 58 on its pivot, as shown in dotted lines in Figures 3 and 4, while manipulating the torch 20 longitudinally by the conventional rack and pinion adjustment 26 and 2'! .to conform to the contour of the work 24. This movement is also indicated by the dotted line illustrations of the torch 2B in Figures 3 and 4.

In order to complete an angular framing out, such as that illustrated in Figures 2 and 4, it will be necessary to make the left half of the out in the manner shown in Figure 2 and turn the work 24 over endwise to finish the cut. This will be necessary in order to obtain the proper bevel along the edges of the out which extend lengthwise of the work. This type of cut is referred to as a framing cut as employed in the main structural members 28, 29 and 39 of the truss structure illustrated in Figure '7.

In effecting the angular cuts on the ends of the laterals ti and 32, as well as the member 30 of the structure shown in Figure '7, one side of the work is cut and the invention is moved to the other side, without changing the angle of the arms I4 and I5, nor the torch 20, and the for angular cut pipe 34.

' of any desired angle determined by the setting of the pointer I I at the proper reading of the graduations 6 on the protractor disk 5. The operation is performed by applying the torch to the work to make the left half of the cut and then turning the work around endwise for cutting the other half. Thus the bevels on each end of the cut will be in the same diagonal plane as in Figures 10 and 11.

In adjusting the invention for operation the arms i4 and I5 are positioned so that the pivot I1 is in a horizontal plane with the longitudinal axis of the pipe to be cut. The diameter of the arcuate cut is determined by the position of the sliding sleeve 22 longitudinally of the bar I8 alon the graduations I 9 thereon.

Manifestly, certain changes and modifications may be resorted to from time to time without departing from the spirit and intent of the invention or the scope of the appended claims.

What is claimed is:

' 1. In a cutting torch holder for angular cuts on pipe and tubing, a slotted base plate adapted for adjustable securement to a table, a circular base member having a circular groove formed in its face and a radial arrangement of graduations adjacent to said groove, an indicator plate pivotally superposed upon the said base member and adjustably securable thereto, a bracket integrally supported centrally of the said indicator plate, a plurality of pivotally connected arms secured to the said bracket and capable of fixed angular adjustment with respect thereto and to each other,

' a torch holder bar having graduations thereon pivotally connected to the outermost of the said arms, a torch holder slidably adjustable with respect to the said graduations along the said bar, said holder being capable of horizontal pivotal adjustment with respect to said bar.

2. In a torch holder for angular cuts on pipe and tubing, a slotted base plate adapted for securement to a bench, a base member comprising a securing plate having a protractor scale on its upper face, an indicator disk pivotally superposed upon the said protractor and adapted to fixed adjustments thereon, a plurality of longitudinally and pivotally connected torch supporting arms having pivotal connection with said indicator disk, the said arms being capable of fixed angular adjustments with respect to each other and the said base member, a graduated torch bar pivotally secured to the end of the outermost of the v said arms, a torch holder arranged for slidable ciated with the said protractor disk and adapted to fixed adjustments in said groove thereon, a plurality of pivotally connected arms having pivotal connection with the said indicator disk and capable of adjustment to various rigid angular positions with respect to said disk and in horizontal and vertical planes, a graduated bar pivotally connected to the outermost of the said arms, a torch holder slidably arranged on the said bar and capable of fixed adjustment longitudinally thereof and adapted to provide for horizontal pivotal movement of said torch.

4. An adjustable torch holder for cutting angles on pipe and tubing comprising, in combination, a base plate having means for longitudinal adjustment with respect to the work, a protractor disk formed with a circular groove and graduations along said groove adjustably fixed to the base plate, an indicator plate pivotally superposed on the said protractor disk and capable of fixed adjustment with respect thereto, a torch supporting structure comprising a plurality of pivotally joined arms in longitudinal arrangement and having pivotal connection with the said indicator plate, the said arms being capable of variable rigid positions with respect to the said indicator I plate and to each other, a graduated bar pivotally connected to the outer end of the said structure having a torch holder slidably arranged thereon and capable of fixed adjustment, said holder having pivotal association with said torch.

5. In a holder for a cutting torch for cutting various angles on pipe and tubing, in combination a base plate having means for adjustment with respect to the work, a circular protractor plate formed with a circular groove and graduations in its face adjustably connected to said base, an indicator plate pivotally superposed on said protractor plate and capable of fixed adjustment with respect thereto, a torch supporting bracket comprising a plurality of pivotally and longitudinally associated arms pivotally connected to the said indicator and capable of adjustment to fixed angular planes with respect thereto and to each other, a holder bar pivotally connected to the outer end of the said bracket and having graduations thereon and a torch holder slidably arranged for fixed adjustments along the said bar.

DONALD L. FORREST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 936,769 Flower Oct. 12, 1909 1,907,956 Gerber May 9, 1933 

